Engadget - As devices get thinner and thinner, there's no place in the world for chunky hard drives, and to that end Western Digital has been talking about bringing ultra-thin 5mm hybrid drive technology to the market. We just got a look at the new drives, which will be branded WD Black -- two 2.5-inch models consisting of a 500GB, 5mm thick (or thin) unit with 24GB of NAND memory, along with a 1TB, 7mm drive that also has 24GB of NAND. A spokesperson said that NAND could eventually go up to 32GB.